Binder of 1950s Topps baseball cards

I found a blue binder stuffed with 1950s Topps baseball cards this afternoon around 3:15pm behind the Century Center parking lot on Michigan Street in South Bend. The cards are in clear sleeves, a bit yellowed, with a couple creases but overall pretty presentable for their age. A couple cards show players like Willie Mays and Hank Aaron, and the binder spine has a tiny red sticker with the initials 'R.K.' tucked in beside a faded price tag that reads '50¢ each.' There’s a weathered orange ticket stub from a 1962 game tucked into the cover pocket. If this belongs to someone, I’m happy to coordinate a safe handoff.